Αναβαλλόμενη εκτέλεση

// Click ">" icon on left to expand demo imports
// Generate keypairs for sender and recipient
const sender = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();

console.log("Sender Address:", sender.address);
console.log("Recipient Address:", recipient.address);

// Demo Setup: Create RPC connection, mint, and token accounts
const { rpc, rpcSubscriptions, mint } = await demoSetup(sender, recipient);

// =============================================================================
// Step 1: Create a Nonce Account
// =============================================================================

const nonceKeypair = await generateKeyPairSigner();
console.log("\nNonce Account Address:", nonceKeypair.address);

const nonceSpace = BigInt(getNonceSize());
const nonceRent = await rpc
  .getMinimumBalanceForRentExemption(nonceSpace)
  .send();

// Instruction to create new account for the nonce
const createNonceAccountIx = getCreateAccountInstruction({
  payer: sender,
  newAccount: nonceKeypair,
  lamports: nonceRent,
  space: nonceSpace,
  programAddress: SYSTEM_PROGRAM_ADDRESS
});

// Instruction to initialize the nonce account
const initNonceIx = getInitializeNonceAccountInstruction({
  nonceAccount: nonceKeypair.address,
  nonceAuthority: sender.address
});

// Build and send nonce account creation transaction
const { value: blockhash } = await rpc.getLatestBlockhash().send();
const createNonceTx = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(sender, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(blockhash, tx),
  (tx) =>
    appendTransactionMessageInstructions(
      [createNonceAccountIx, initNonceIx],
      tx
    )
);

const signedCreateNonceTx =
  await signTransactionMessageWithSigners(createNonceTx);
assertIsTransactionWithBlockhashLifetime(signedCreateNonceTx);

await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(
  signedCreateNonceTx,
  { commitment: "confirmed" }
);

console.log("Nonce Account created.");

// =============================================================================
// Step 2: Token Payment with Durable Nonce
// =============================================================================

// Fetch current nonce value from the nonce account
const { data: nonceData } = await fetchNonce(rpc, nonceKeypair.address);
console.log("Nonce Account data:", nonceData);

const [senderAta] = await findAssociatedTokenPda({
  mint: mint.address,
  owner: sender.address,
  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});

const [recipientAta] = await findAssociatedTokenPda({
  mint: mint.address,
  owner: recipient.address,
  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});

console.log("\nMint Address:", mint.address);
console.log("Sender Token Account:", senderAta);
console.log("Recipient Token Account:", recipientAta);

const transferInstruction = getTransferInstruction({
  source: senderAta,
  destination: recipientAta,
  authority: sender.address,
  amount: 250_000n // 0.25 tokens
});

// Create transaction message using durable nonce lifetime
// setTransactionMessageLifetimeUsingDurableNonce automatically prepends
// the AdvanceNonceAccount instruction
const transactionMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(sender, tx),
  (tx) =>
    setTransactionMessageLifetimeUsingDurableNonce(
      {
        nonce: nonceData.blockhash as string as Nonce,
        nonceAccountAddress: nonceKeypair.address,
        nonceAuthorityAddress: nonceData.authority
      },
      tx
    ),
  (tx) => appendTransactionMessageInstructions([transferInstruction], tx)
);

const signedTransaction =
  await signTransactionMessageWithSigners(transactionMessage);
assertIsTransactionWithDurableNonceLifetime(signedTransaction);
const transactionSignature = getSignatureFromTransaction(signedTransaction);

// Encode the transaction to base64, optionally save and send at a later time
const base64EncodedTransaction =
  getBase64EncodedWireTransaction(signedTransaction);
console.log("\nBase64 Encoded Transaction:", base64EncodedTransaction);

// Send the encoded transaction, blockhash does not expire
await rpc
  .sendTransaction(base64EncodedTransaction, {
    encoding: "base64",
    skipPreflight: true
  })
  .send();

console.log("\n=== Token Payment with Durable Nonce Complete ===");
console.log("Transaction Signature:", transactionSignature);

// =============================================================================
// Demo Setup Helper Function
// =============================================================================